Digital Duplex Executive Conference SpeakerphoneFull-featured speakerphone records conferences up to 120 minutes. Digital circuitry reduces echo and dropout; allows for more natural-sounding conversations. Features audio output for external recording devices, call waiting and 100-station phone directory and dialer. Keys include mute, redial, flash, pause and program. Offers support for Caller ID with 50-station caller ID memory and call back. Four built-in corner microphones.

From the Manufacturer:

Utilizes technologically advanced fully digital duplex communication technology helps reduce the echo and dropouts commonly found in many speakerphones, leading to crisp and natural conversations. Sound is transferred via Panasonic neodymium speakers and eight hyper cardioid microphones (two at each corner) with active sound processing technology, delivering hi-fi sound quality.
Ultra-sensitive eight-microphone system
Two microphones at each of the four corners allow the unit to capture omni-directional voices at a distance. It is designed to receive audio in a 360-degree radius in rooms up to 380 square feet, so you can speak at a distance of up to 10 feet away and still be heard. This allows you to move about the conference room with the confidence of knowing that your voice will be heard clearly.
120-minute conference recording
Up to 120 minutes of your most important calls can be recorded, letting you concentrate on the conversation, rather than writing endless pages of notes. And if you want to take your recordings with you, there is a 3.5mm audio out jack that allows you to record your conversations to cassettes, wave files and MP3 files.
See who's calling
With subscription to local service, the convenient caller ID feature allows the KX-TS730 to display the name and number of incoming callers on an amber glow LCD. And a memory capacity of 50 names and numbers allows for easy retrieval and direct callback. You can store up to 100 telephone numbers for quick viewing and dialing. In addition to the ability to retrieve your contacts quickly and easily, there's also a storage capacity of up to 32 digits that allows you to save lengthy long-distance access codes for overseas numbers.